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32x, improve poll detection

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This commit is contained in:
kub 2021-06-28 22:58:04 +02:00
parent 3368c27707
commit bd07808352
6 changed files with 17 additions and 4 deletions
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1
cpu/sh2/compiler.c
View file

@ -4417,6 +4417,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
EMITH_HINT_COND(DCOND_EQ);
emith_subf_r_r_imm(tmp, tmp2, 1);
emith_set_t_cond(sr, DCOND_EQ);
emith_or_r_imm(sr, SH2_NO_POLLING);
goto end_op;
}
goto default_;

1
cpu/sh2/mame/sh2.c
View file

@ -800,6 +800,7 @@ INLINE void DT(sh2_state *sh2, UINT32 n)
sh2->sr |= T;
else
sh2->sr &= ~T;
sh2->no_polling = SH2_NO_POLLING;
#if BUSY_LOOP_HACKS
{
UINT32 next_opcode = (UINT32)(UINT16)RW( sh2, sh2->ppc & AM );

6
cpu/sh2/mame/sh2pico.c
View file

@ -24,9 +24,10 @@ typedef u8 UINT8;
static __inline unsigned int name(SH2 *sh2, unsigned int a) \
{ \
unsigned int ret; \
sh2->sr |= sh2->icount << 12; \
sh2->sr |= (sh2->icount << 12) | (sh2->no_polling); \
ret = cname(a, sh2); \
sh2->icount = (signed int)sh2->sr >> 12; \
sh2->no_polling = (sh2->sr & SH2_NO_POLLING); \
sh2->sr &= 0x3f3; \
return ret; \
}
@ -34,9 +35,10 @@ static __inline unsigned int name(SH2 *sh2, unsigned int a) \
#define MAKE_WRITEFUNC(name, cname) \
static __inline void name(SH2 *sh2, unsigned int a, unsigned int d) \
{ \
sh2->sr |= sh2->icount << 12; \
sh2->sr |= (sh2->icount << 12) | (sh2->no_polling); \
cname(a, d, sh2); \
sh2->icount = (signed int)sh2->sr >> 12; \
sh2->no_polling = (sh2->sr & SH2_NO_POLLING); \
sh2->sr &= 0x3f3; \
}

3
cpu/sh2/sh2.h
View file

@ -56,6 +56,9 @@ typedef struct SH2_
uint32_t poll_addr;
int poll_cycles;
int poll_cnt;
// NB MUST be a bit unused in SH2 SR, see also cpu/sh2/compiler.c!
#define SH2_NO_POLLING (1 << 10) // poll detection control
int no_polling;
// DRC branch cache. size must be 2^n and <=128
int rts_cache_idx;

6
pico/32x/memory.c
View file

@ -119,8 +119,9 @@ void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
// reading 2 consecutive 16bit values is probably a 32bit access. detect this
// by checking address (max 2 bytes away) and cycles (max 2 cycles later).
// no polling if more than 20 cycles have passed since last detect call.
if (a - sh2->poll_addr <= 2 && CYCLES_GE(10, cycles_diff)) {
if (CYCLES_GT(cycles_diff, 2) && ++sh2->poll_cnt >= maxcnt) {
if (a - sh2->poll_addr <= 2 && CYCLES_GE(20, cycles_diff)) {
if (!sh2_not_polling(sh2) && CYCLES_GT(cycles_diff, 2) &&
++sh2->poll_cnt >= maxcnt) {
if (!(sh2->state & flags))
elprintf_sh2(sh2, EL_32X, "state: %02x->%02x",
sh2->state, sh2->state | flags);
@ -144,6 +145,7 @@ void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
sh2->poll_addr = a;
}
sh2->poll_cycles = cycles_done;
sh2_set_polling(sh2);
}
void NOINLINE p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)

4
pico/pico_int.h
View file

@ -224,6 +224,8 @@ extern SH2 sh2s[2];
# define sh2_cycles_left(sh2) (sh2)->icount
# define sh2_burn_cycles(sh2, n) (sh2)->icount -= n
# define sh2_pc(sh2) (sh2)->ppc
# define sh2_not_polling(sh2) (sh2)->no_polling
# define sh2_set_polling(sh2) (sh2)->no_polling = 0
#else
# define sh2_end_run(sh2, after_) do { \
int left_ = ((signed int)(sh2)->sr >> 12) - (after_); \
@ -235,6 +237,8 @@ extern SH2 sh2s[2];
# define sh2_cycles_left(sh2) ((signed int)(sh2)->sr >> 12)
# define sh2_burn_cycles(sh2, n) (sh2)->sr -= ((n) << 12)
# define sh2_pc(sh2) (sh2)->pc
# define sh2_not_polling(sh2) ((sh2)->sr & SH2_NO_POLLING)
# define sh2_set_polling(sh2) ((sh2)->sr &= ~SH2_NO_POLLING)
#endif
#define sh2_cycles_done(sh2) (unsigned)((int)(sh2)->cycles_timeslice - sh2_cycles_left(sh2))